Dark Adaptation

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5 Terms

1
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Measuring dark adaptation

observer is light adapted, light turned off, every min or so observer adjusts intensity of test light

2
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Cones

moment we go into darkness they kick in; respond quickly to darkness; but they level off quickly when it comes to sensitivity

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rods

responds immediately when we go into darkness, gradually get more sensitive and level

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Rod cone break

break between the two systems. We swtich from relying on cones to rods

5
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Purkinje Shift

enhanced sensitivity to short wavelengths during dark adaptation when the shift from one (photopic) to rod (scotopic) vision occurs